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The present study was carried out to induce seed mutants in cowpea for getting desired mutants for increased yield, bold seed size. Dry seeds of cowpea varieties were exposed to gamma irradiation from cobalt 60 source at 250 Gy dosages. The non-irradiated parent was used as the control. Identification and selections were carried out at the second generation (M2). The treated and untreated plants were self-fertilized for five generations to observe different morphological characters in M6 generation. Several unique and interesting mutants were isolated in thisinvestigation. Cowpea mutants were screened for useful agronomic traits. These independent mutants have different phenotypes from control. The most distinct mutants included were different pod size, pod shapeshape and coat color of seeds were also observed. The mutants selected from 250 Gy population included plants with increased vegetative growth of plants, increased number of pods, increase in size of pods, curved pods, early maturing plants with broad leaflets, Plants resistant to thrips, black seed colourand bold seed size. The selected mutants were found to possess useful agronomic traits capable of conferring on them selection advantage for increased yield, easy harvesting and insect tolerance.

Studies on induction of genetic variation through seed mutation in cowpea (<em>Vigna unguiculata</em> L. Walp.) by gamma irradiation